The human visual system has evolved over many tens of millions of years to operate in a world that is mostly lit by white light. Systems in the brain, working entirely unconsciously, compensate for changes in illumination. This resource is for teachers, parents and carers to use in Sciences (SCN 1-12b / SCN 2-11b / SCN 2-12b / SCN 3-12a) for First / Second / Third (P2 – S3).
Peter Reid